From all this it follows what the general character of the problem of the development of a body of scientific knowledge is in so far as it depends on elements internal to science itself.
But the scientific importance of a change in knowledge of fact consists precisely in j its having consequences for a system of theory.
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It is probably safe to say that all the changes of factual knowledge which have led to the relativity theory resulting in a very great theoretical development are completely trivial from any point of view except their relevance to the structure of a theoretical system.
